使diff-lcs的输出成为可读的
我正在使用diff-lcs gem来输出两个html内容体之间的差异。 这是示例内容。
第一版：
Paragraph one. Sentence one.
Paragraph two. Another sentence.
Paragraph three. I dare you to change me!
第二版：
Paragraph one. Sentence two.
Paragraph two. Another sentence.
Paragraph three. I dare you to update me!
使用这个：
seq1 = @versionOne.body seq2 = @versionTwo.body seq = Diff::LCS.diff(seq1, seq2)
你得到这个怪物：
seq => [[#, #], [#, #], [#, #, #, #, #], [#, #, #], [#]]
文档中的sdiff和其他方法的输出同样令人恐惧。 我理解数组（数组）的结构，但必须有一种简单的方法来以人类可读和风格的方式显示差异。
PS – 如果有人想创建diff-lcs标签，那将不胜感激。
我正在为diff-lcs提供的是一个常规字符串 – 一个字符数组。 如果我想要的是人物的比较，我得到了我想要的东西，但我想要更具可读性的东西 – 比较单词，句子或句子。 我选择了句子。
seq1 = @versionOne.body.split('.') seq2 = @versionTwo.body.split('.') compareDiff = Diff::LCS.sdiff(seq1, seq2)
这产生了更具可读性和可解析性的内容。 实际上，我也想分开! 和? 。 然而，该结构不是正常的数组或散列数组。 浏览器中的输出让我失望，但它是一个对象数组，你可以像其他任何东西一样解析它。 这是我在rails控制台中获得的YAML格式化输出（不知道为什么它没有在浏览器中显示）：
--- - !ruby/object:Diff::LCS::ContextChange action: "=" new_element: Paragraph one new_position: 0 old_element:
Paragraph one old_position: 0 - !ruby/object:Diff::LCS::ContextChange action: "!" new_element: " Sentence two" new_position: 1 old_element: " Sentence one" old_position: 1 - !ruby/object:Diff::LCS::ContextChange action: "=" new_element: |-
Paragraph two new_position: 2 old_element: |-
Paragraph two old_position: 2 - !ruby/object:Diff::LCS::ContextChange action: "=" new_element: " Another sentence" new_position: 3 old_element: " Another sentence" old_position: 3 - !ruby/object:Diff::LCS::ContextChange action: "=" new_element: |-
Paragraph three new_position: 4 old_element: |-
Paragraph three old_position: 4 - !ruby/object:Diff::LCS::ContextChange action: "!" new_element: " I dare you to update me!
" new_position: 5 old_element: " I dare you to change me!" old_position: 5 => nil
超级有帮助！ 这将输出类似wiki的差异：
sdiff = Diff::LCS.sdiff(seq2, seq1) diffHTML = '' sdiff.each do |diff| case diff.action when '=' diffHTML << diff.new_element + "." when '!' # strip_tags only needed on old_element. removes pre-mature end tags. diffHTML << "#{diff.old_element.strip_tags} #{diff.new_element} . " end end @compareBody = diffHTML.html ...[format do block]
然后根据需要设置样式